CVE-2021-1782

CRITICALNVD 7.09.0▲
EchelonGraph scoreHIGH confidence

Score elevated to 9.0 because this CVE is listed on the CISA Known Exploited Vulnerabilities catalog (added 2021-11-03), indicating real-world exploitation has been confirmed by US federal agencies. NVD baseline CVSS 7.0 retained for reference. Confidence: HIGH.

Triggered by: CISA KEV (actively exploited)
Sources: cisa_kev, epss, ghsa, nvd
Trending — 4 sources updated this weekExploited in the wild
9.0EG
EchelonGraph verdictPatch nowTreat as an emergency — this is being exploited.
  • Actively exploited in the wild (CISA-KEV)
CISA-KEV: ExploitedEPSS PROB: 2%CVSS: 7.0Exploit: cisa kev · ssvc active · public exploitExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

A race condition was addressed with improved locking. This issue is fixed in macOS Big Sur 11.2, Security Update 2021-001 Catalina, Security Update 2021-001 Mojave, watchOS 7.3, tvOS 14.4, iOS 14.4 and iPadOS 14.4. A malicious application may be able to elevate privileges. Apple is aware of a report that this issue may have been actively exploited..

CVSS v3
7.0
EG Score
9.0(high)
EG Risk
81(Attend)
EG Risk 81/100SSVC: Attend

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity90% × 45%
Exploitation100% × 40%
Automatability0% × 15%
Action: Remediate soon — notable exploitation risk.
EPSS PROB
2%
EPSS %ILE
82%
KEV
⚠ Exploited

Published

April 2, 2021

Last Modified

October 23, 2025

Advisory Details (5)

Auto-updated Jun 11, 2026
⚠️ Active exploitation confirmed. Patch available. Sources: cisa.
cisa Patch Available🔴 Active Exploitation

Known Exploited Vulnerabilities Catalog | CISA

Known Exploited Vulnerabilities Catalog | CISA. Listed in CISA Known Exploited Vulnerabilities catalog.

https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-1782
generic🔴 Active Exploitation

About the security content of tvOS 14.4 - Apple Support

https://support.apple.com/en-us/HT212149
generic🔴 Active Exploitation

About the security content of watchOS 7.3 - Apple Support

https://support.apple.com/en-us/HT212148
generic🔴 Active Exploitation

About the security content of macOS Big Sur 11.2, Security Update 2021-001 Catalina, Security Update 2021-001 Mojave - Apple Support

https://support.apple.com/en-us/HT212147
generic🔴 Active Exploitation

About the security content of iOS 14.4 and iPadOS 14.4 - Apple Support

https://support.apple.com/en-us/HT212146

Weakness Classification(2)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 54× in last 7d / 237× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 855 total refreshes for this CVE.

  1. 2026-09-19 11:00 UTCGHSA enrichment
  2. 2026-09-19 06:39 UTCGHSA enrichment
  3. 2026-09-19 02:18 UTCGHSA enrichment
  4. 2026-09-18 21:58 UTCEG score recompute
  5. 2026-09-18 21:58 UTCGHSA enrichment
  6. 2026-09-18 19:23 UTCEPSS rescore
  7. 2026-09-18 19:20 UTCCISA KEV update
  8. 2026-09-18 17:38 UTCGHSA enrichment
  9. 2026-09-18 14:15 UTCCISA KEV update
  10. 2026-09-18 13:17 UTCGHSA enrichment
  11. 2026-09-18 08:56 UTCGHSA enrichment
  12. 2026-09-18 04:35 UTCGHSA enrichment
  13. 2026-09-18 00:14 UTCGHSA enrichment
  14. 2026-09-17 19:54 UTCEG score recompute
  15. 2026-09-17 19:53 UTCGHSA enrichment
  16. 2026-09-17 19:23 UTCEPSS rescore
  17. 2026-09-17 15:32 UTCGHSA enrichment
  18. 2026-09-17 11:11 UTCGHSA enrichment
  19. 2026-09-17 06:50 UTCGHSA enrichment
  20. 2026-09-17 02:28 UTCGHSA enrichment
  21. 2026-09-16 22:04 UTCGHSA enrichment
  22. 2026-09-16 17:43 UTCEG score recompute
  23. 2026-09-16 17:43 UTCGHSA enrichment
  24. 2026-09-16 14:10 UTCCISA KEV update
  25. 2026-09-16 14:05 UTCEPSS rescore
Show 75 more
  1. 2026-09-16 14:04 UTCEPSS rescore
  2. 2026-09-16 13:21 UTCGHSA enrichment
  3. 2026-09-16 08:56 UTCEG score recompute
  4. 2026-09-16 08:56 UTCGHSA enrichment
  5. 2026-09-16 04:35 UTCGHSA enrichment
  6. 2026-09-16 00:15 UTCGHSA enrichment
  7. 2026-09-15 19:53 UTCGHSA enrichment
  8. 2026-09-15 15:32 UTCGHSA enrichment
  9. 2026-09-15 11:11 UTCGHSA enrichment
  10. 2026-09-15 06:50 UTCEG score recompute
  11. 2026-09-15 06:50 UTCGHSA enrichment
  12. 2026-09-15 03:06 UTCEPSS rescore
  13. 2026-09-15 02:29 UTCGHSA enrichment
  14. 2026-09-14 22:06 UTCGHSA enrichment
  15. 2026-09-14 19:24 UTCCISA KEV update
  16. 2026-09-14 17:45 UTCGHSA enrichment
  17. 2026-09-14 13:24 UTCGHSA enrichment
  18. 2026-09-14 09:03 UTCGHSA enrichment
  19. 2026-09-14 04:43 UTCGHSA enrichment
  20. 2026-09-14 00:22 UTCGHSA enrichment
  21. 2026-09-13 20:02 UTCGHSA enrichment
  22. 2026-09-13 15:41 UTCGHSA enrichment
  23. 2026-09-13 11:21 UTCGHSA enrichment
  24. 2026-09-13 07:00 UTCGHSA enrichment
  25. 2026-09-13 02:39 UTCGHSA enrichment
  26. 2026-09-12 22:19 UTCGHSA enrichment
  27. 2026-09-12 17:58 UTCEG score recompute
  28. 2026-09-12 17:58 UTCGHSA enrichment
  29. 2026-09-12 14:57 UTCEPSS rescore
  30. 2026-09-12 13:37 UTCGHSA enrichment
  31. 2026-09-12 09:16 UTCGHSA enrichment
  32. 2026-09-12 04:56 UTCGHSA enrichment
  33. 2026-09-12 00:35 UTCGHSA enrichment
  34. 2026-09-11 20:14 UTCGHSA enrichment
  35. 2026-09-11 18:49 UTCCISA KEV update
  36. 2026-09-11 15:53 UTCEG score recompute
  37. 2026-09-11 15:53 UTCGHSA enrichment
  38. 2026-09-11 11:32 UTCEG score recompute
  39. 2026-09-11 11:31 UTCGHSA enrichment
  40. 2026-09-11 09:33 UTCEPSS rescore
  41. 2026-09-11 07:05 UTCGHSA enrichment
  42. 2026-09-11 02:44 UTCGHSA enrichment
  43. 2026-09-10 22:23 UTCGHSA enrichment
  44. 2026-09-10 19:28 UTCCISA KEV update
  45. 2026-09-10 18:02 UTCGHSA enrichment
  46. 2026-09-10 13:41 UTCEG score recompute
  47. 2026-09-10 13:41 UTCGHSA enrichment
  48. 2026-09-10 09:29 UTCEPSS rescore
  49. 2026-09-10 09:20 UTCGHSA enrichment
  50. 2026-09-10 04:58 UTCGHSA enrichment
  51. 2026-09-10 00:37 UTCGHSA enrichment
  52. 2026-09-09 20:16 UTCGHSA enrichment
  53. 2026-09-09 19:08 UTCCISA KEV update
  54. 2026-09-09 15:55 UTCGHSA enrichment
  55. 2026-09-09 11:34 UTCGHSA enrichment
  56. 2026-09-09 07:14 UTCGHSA enrichment
  57. 2026-09-09 02:52 UTCGHSA enrichment
  58. 2026-09-08 22:31 UTCEG score recompute
  59. 2026-09-08 22:31 UTCGHSA enrichment
  60. 2026-09-08 21:56 UTCEPSS rescore
  61. 2026-09-08 18:54 UTCCISA KEV update
  62. 2026-09-08 18:09 UTCGHSA enrichment
  63. 2026-09-08 13:05 UTCGHSA enrichment
  64. 2026-09-08 08:44 UTCGHSA enrichment
  65. 2026-09-08 04:22 UTCGHSA enrichment
  66. 2026-09-08 00:01 UTCGHSA enrichment
  67. 2026-09-07 19:41 UTCEG score recompute
  68. 2026-09-07 19:41 UTCGHSA enrichment
  69. 2026-09-07 15:58 UTCEPSS rescore
  70. 2026-09-07 15:21 UTCGHSA enrichment
  71. 2026-09-07 11:00 UTCGHSA enrichment
  72. 2026-09-07 06:37 UTCGHSA enrichment
  73. 2026-09-07 02:15 UTCGHSA enrichment
  74. 2026-09-06 21:53 UTCGHSA enrichment
  75. 2026-09-06 17:31 UTCEG score recompute

Publicly available exploits

(1 reference)

Working exploit code is in the public domain (1 GitHub PoC). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

Frequently asked(6)

What is CVE-2021-1782?
CVE-2021-1782 is a critical vulnerability published on April 2, 2021. A race condition was addressed with improved locking. This issue is fixed in macOS Big Sur 11.2, Security Update 2021-001 Catalina, Security Update 2021-001 Mojave, watchOS 7.3, tvOS 14.4, iOS 14.4 and iPadOS 14.4. A malicious application may be able to elevate privileges. Apple is aware of a…
When was CVE-2021-1782 disclosed?
CVE-2021-1782 was first published in the National Vulnerability Database on April 2, 2021, with the most recent update on October 23, 2025. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2021-1782 actively exploited?
Yes. CISA added CVE-2021-1782 to the Known Exploited Vulnerabilities catalog on November 3, 2021, affecting Apple Multiple Products. KEV listing indicates confirmed exploitation in the wild; this CVE warrants immediate patching attention.
What is the CVSS score of CVE-2021-1782?
CVE-2021-1782 has a CVSS v3 base score of 7.0 (NVD). EchelonGraph synthesises NVD + CISA KEV + FIRST EPSS + GHSA into a combined EG score of 9.0.
Which products are affected by CVE-2021-1782?
CVE-2021-1782 affects Apple Multiple Products. The full affected-products list, including version ranges and fixed versions, is shown in the Affected Packages section of this page.
How do I remediate CVE-2021-1782?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2021-1782, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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